/*
 * @Description: 预测结果
 * @Author: zzj
 * @Date: 2021-09-10 14:16:10
 * @LastEditors: zzj
 * @LastEditTime: 2021-09-10 14:16:10
 */

/*
(function(){
 var a = b = 3;
})();
 
console.log("a defined? " + (typeof a !== 'undefined')); 
console.log("b defined? " + (typeof b !== 'undefined'));
*/